Monochromatic light and reflection

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    Light Reflection
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Homework Help Overview

The discussion revolves around a problem involving monochromatic light and its behavior during reflection, particularly in relation to critical angles and refractive indices.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the reasoning behind the correct answer, questioning the relevance of the critical angle and the index of refraction. There are suggestions that the problem may be geometric in nature, and some participants express confusion regarding the teacher's intentions.

Discussion Status

The discussion is active, with participants sharing their thoughts and interpretations. Some guidance has been offered regarding the phase change at boundaries, indicating a potential direction for further exploration.

Contextual Notes

There is mention of a practice exam context, with some participants noting that many struggled with the question, suggesting it may have been designed to be misleading.

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Perhaps just a geometric problem?
 

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so perhaps the index of refraction does not matter?
 
From that question, I wouldn't say so .. I assumed it continued to asking something else later on, more relevant to the refractive index?
 
lol no. This was a practice exam and half the people got it wrong. I guess the teacher was just being tricky.
 
Very sneaky!

Well, from how it reads, I'd say that's the right answer
 
Think of phase change at both boundaries: air-alcohol and alcohol-plastic. What is the phase difference between the wave reflected from the alcohol-plastic interface and the directly reflected one (from the air-alcohol interface)?

ehild
 

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